Hello,
Customer used his own am4372 board, u-boot 2013.10, below is the PinMUX for rmii in mux.c:
static struct module_pin_mux henry_rmii1_pin_mux[] = {
{OFFSET(mii1_txd1), MODE(1)}, /* RMII1_TD1 */
{OFFSET(mii1_txd0), MODE(1)}, /* RMII1_TD0 */
{OFFSET(mii1_rxd1), MODE(1) | RXACTIVE}, /* RMII1_RD1 */
{OFFSET(mii1_rxd0), MODE(1) | RXACTIVE}, /* RMII1_RD0 */
{OFFSET(mii1_crs), MODE(1) | RXACTIVE}, /* RMII1_CRS_DV */
{OFFSET(mii1_txen), MODE(1)}, /* RMII1_TXEN */
{OFFSET(mii1_rxerr), MODE(1) | RXACTIVE}, /* RMII1_RXERR */
{OFFSET(rmii1_refclk), MODE(0) | RXACTIVE}, /* RMII1_refclk */
{-1},
};
MDIO pinmux：
static struct module_pin_mux mdio_pin_mux[] = {
{OFFSET(mdio_data), MODE(0) | RXACTIVE | PULLUP_EN},/* MDIO_DATA */
{OFFSET(mdio_clk), MODE(0) | PULLUP_EN}, /* MDIO_CLK */
{-1},
};
In u-boot, use mii command, it can find two PHY, but in fact there is only one ethernet with PHY address: 3.
Linux version is 4.19.94，mii configuration in dts:
In kernel, MDIO find two PHY too.
What's reason it can find the address 0 PHY?
Thanks.
Rgds
Shine
